I sometimes wonder if I have the chops for this... Also why I don't really do any reviews.
Because... All 3 sound extremely similar to me. Also probably means it's a good time to slim down the collection as I think that even though there are differences, theres likely too much similarity here, plus this is a lot of money to have spent...
I have also done a comparison with the trio and ag in another thread. And the conclusion there was basically that the trio feels better detailed, and better extended on both ends than the ag, with a little extra bass and treble emphasis making it sound slightly more v shaped to me. I see you already have both so I don't know if that matches with your conclusions or not.
Throwing the Solaris into the mix I would say overall it has a very similar signature to the android gold (maybe not counting any individual peaks or spikes, which I find harder to detect). One thing I noted with the ag vs the trio is that the treble has a tiny bit of a grainy feel to it, maybe due to not using crossovers. It adds a bit of texture, but it's less smooth. The Solaris feels smoother there. I would say soundstage on the gold falls slightly behind the trio, with the Solaris feeling relatively similar to the trio. More holographic and a better sense of space than the ag, if only by a small amount.
Bass is I think the real difference. Mid bass may be slightly boosted on the gold, maybe, but there's I think there's some falloff in the subbass. There's maybe slightly more of a thump with the ag, but the Solaris goes deeper and feels more full and physical, even if maybe bass overall is ever so slightly less emphasized. Maybe?
I'm trying real hard to come up with differences, so just keep in mind that everything I am describing here is very small, like marginal differences. Maybe some slight timbre differences too between them, but I am definitely struggling to pick out exactly how they differ.
I would say the trio and Solaris are likely playing at a higher level than the gold, if only just. With the trio being the most v shaped, by virtue of just having a bit more bass and treble energy.
Things to consider for everyone who might read. Solaris are new out of the box with maybe 1 hour of playtime. Ag have some decent use on them, and the trio also has some decent use. For those who care about potential burn in (I don't really believe). I tried to volume match best as I could. Solaris and ag produce very similar volume levels at the same level on my dap. So I left volume the same (24 mid gain, cayin n6ii e01 for anyone interested). Trio needed somewhere around 42 to get to a similar volume level. Both ag and Solaris hiss. Hiss is worse with the ag. No hiss at all with trio.
Tips are...
Medium (red) spinfit cp100 2019 version on ag. LL final e on Solaris. Large spinfit cp155 (I think) with spinfit adapter on trio.
Comfort is an easy win for me to the ag. They just kind of disappear into my ears. The trio are pretty good too, but a. It larger so I had to do a lot of tip rolling (still haven't settled 100% on a cable, too bad there's no 2 pin smoky litz). Jury is out on the Solaris. They seem relatively comfortable, but I have them with a super shallow fit and angled slightly forward they seem fine, but a full work day will be the judge.
Is the Solaris a worthy upgrade over the gold? I think so. It feels like the gold is just a slightly less refined version, plus dd bass on the Solaris. Is it worth it to have both? Probably not. So if you are happy with the trio/ag combo you'll definitely be happy with the trio/solaris combo. But I'm also not sure it's really worth it to have both the trio and Solaris either. Guess it comes down to valuing something a bit flatter or something a bit more v shaped.
I should also say I think I still prefer the sound of the z1r over all of these, but fit there sucks. It just has such smooth yet detailed treble and such beautiful bass that it's hard for me find something better.
And lastly, for now, a size comparison between the 3.